GB1469287A - Method and device for reforming the quality of fuel oil in an internal combustion engine - Google Patents

Abstract

1469287 Gaseous fuels TOYOTA JIDOSHA KOGYO KK 2 May 1974 [4 May 1973] 19339/74 Heading C5E [Also in Divison F1] Hydrocarbon fuel for an internal combustion engine is treated by feeding a fuel-air mixture to a fuel reformer, diverting a portion of the mixture into a separate path within the reformer and burning at least a portion of the diverted portion to heat and vaporize the remainder of the mixture in the reformer, combining the burnt and remaining portions of the mixture and passing it over a catalyst; the resultant mixture, together with additional air and additional fuel, is supplied to a combustion chamber of the engine. As illustrated in Fig. 1 (not shown), the main air-fuel mixture from the main carburetter is passed through a manifold, and an auxiliary air-fuel mixture from an auxiliary carburetter is passed through a reformer and into the manifold and the cylinders of the engine. Fig. 3 illustrates a reformer 7 which has an entry pipe 9 into which the auxiliary air-fuel mixture is passed, the main portion of the auxiliary mixture is passed through the heat-conducting tubes 10 and a branch portion of the auxiliary mixture is passed into a combustion chamber 14. The chamber 14 has an electrode spark plug 13 or an electric heating wire. The combustion in the chamber 14 heats and fully vaporizes the mixture in the tubes 10 and the burnt gas from the chamber 14 is mixed with the mixture in the tubes 10 and the mixture passed through the catalyst 19. The auxiliary mixture suitably has an air-fuel volume ratio of 3 and the ratio of mixture passing through the tubes 10 to that passing through the combustion chamber 14 can be 3 : 1; the mixture entering the chamber 14 is leaner than that in the tubes 10 and can be between 20 : 1 and 13 : 1. The mixture entering the catalyst chamber can be at 200-400‹ C.